25... a7a6 Preparing the coming sacrifice. 26. b5b2 Deep prophylaxis, so typical for Carlsen, no matter what the time control is. 26... e7h4 Things are starting to heat up and Keymer is standing strong. 27. a4a5 The pawn on h4 is not so important for White, who is betting on his c-passer. 27... b6a5 There is not much of a choice.